One choice that satisfies the above conditions is
\(\lambda ^{(k)}_{m,m}= 1- d |\varrho (m)|\)  and \(\lambda ^{(k)}_{m,m^{\prime }}= d \) , \(m\ne m^{\prime }\) , \(0 < d < 1 / M\)  [1]}. These weights can be distributedly obtained at the ESs given a predefined \(d\) .
